EP 1394509 A2 20040303 - Angular velocity sensor
Title (en)
Angular velocity sensor
Title (de)
Drehgeschwindigkeitssensor
Title (fr)
Capteur de vitesse de rotation
Publication
Application
Priority
- EP 99924019 A 19990611
- JP 16662398 A 19980615
Abstract (en)
An angular rate sensor for a vibration body comprising means for detecting a level of vibrations of a vibration body, detecting means for detecting a Coriolis' force produced in proportion to an angular rate, a current amplifier for amplifying an output signal of said means of detecting a level of vibrations, a full-wave rectifier circuit for producing a D.C. voltage by rectifying an output signal of a band-pass filter, wherein an output signal of said current amplifier is input, a charge amplifier for inputting and amplifying a signal detected by said detecting means for detecting a Coriolis' force, a synchronous detection circuit for detecting an output signal of a band-pass filter, wherein an output signal of said charge amplifier is input, a sensor output terminal for outputting an output signal of a low-pass filter, wherein an output signal of said synchronous detection circuit is input, a determination circuit for inputting the output signal of said full-wave rectifier circuit and an output signal of said charge amplifier, and for making a determination of abnormality, and an output clamping circuit having a transistor connected to a sensor output terminal, said output clamping circuit activated by an output signal of said determination circuit, if said determination circuit makes a determination of abnormality, said transistor is forward-biased and said output clamping circuit clamps the output signal of said sensor output terminal at a level close to a power supply voltage.
IPC 1-7
IPC 8 full level
G01C 19/56 (2012.01); G01C 19/5607 (2012.01); G01C 19/5614 (2012.01); G01P 9/04 (2006.01)
CPC (source: EP US)
G01C 19/5607 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
EP 1394509 A2 20040303; EP 1394509 A3 20110629; EP 1394509 B1 20141203; EP 1004849 A1 20000531; EP 1004849 A4 20030502; JP 2000002542 A 20000107; JP 4019504 B2 20071212; US 6386034 B1 20020514; WO 9966289 A1 19991223
DOCDB simple family (application)
EP 03026569 A 19990611; EP 99924019 A 19990611; JP 16662398 A 19980615; JP 9903152 W 19990611; US 48562600 A 20000508